Matt Killeen Books

La espia de Hitler

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In this utterly gripping thriller, Sarah, the fearless heroine of indie bestseller Orphan Monster Spy, hunts a rogue German doctor in Central Africa who might be a serial murderer.It's 1940, and Sa...

Orphan Monster Spy

By Matt Killeen

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After her mother is shot at a checkpoint, fifteen-year-old Sarah meets a mysterious man with an ambiguous accent, a suspiciously bare apartment, and a lockbox full of weapons. He's part of the secr...

Orphan Monster Spy

By Matt Killeen

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"Like Inglourious Basterds for tweens, this clever YA title features Sarah, a blond, blue-eyed Jewish girl in 1939 Germany."--The New York Post After her mother is shot at a checkpoint, fifteen...

Orphan Monster Spy

By Matt Killeen

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Devil Darling Spy

By Matt Killeen

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Sierota bestia szpieg

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Huerfana. Monstruo. Espia. Orphan. Monster. Spy.

By Matt Killeen

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Su nombre es Sarah. Es rubia, de ojos azules y judía en la Alemania de 1939. Y sus actos de resistencia están a punto de hacer cambiar la historiaVerano de 1939. Para los judío...

Huerfana monstruo espia

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.